The role of sheet-like TiO2 in polyamide reverse osmosis membrane for enhanced removal of endocrine disrupting chemicals

Nor Akalili, Ahmad and Goh, Pei Sean and Nur Alyaa Syfina, Zakaria and Rosmawati, Naim and Mohd Sohaimi, Abdullah and Ahmad Fauzi, Ismail and Norbaya, Hashim and Nirmala Devi, Kerisnan@Kerishnan and Nasehir Khan, E.M. Yahaya and Alias, Mohamed (2024) The role of sheet-like TiO2 in polyamide reverse osmosis membrane for enhanced removal of endocrine disrupting chemicals. Chemosphere, 353 (141108). pp. 1-11. ISSN 0045-6535. (Published)

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Abstract

Thin film composite (TFC) reverse osmosis (RO) membrane shows good promise for treating wastewater containing endocrine disrupting chemical (EDC) pollutants. The incorporation of functional materials with exceptional structural and physico-chemical properties offers opportunities for the membranes preparation with enhanced permselectivity and better antifouling properties. The present study aims to improve the EDC removal efficiency of TFC RO membrane using two-dimensional titania nanosheets (TNS). RO membrane was prepared by incorporating TNS in the dense layer of polyamide (PA) layer to form thin film nanocomposite (TFN) membrane. The TNS loading was varied and the influences on membrane morphology, surface hydrophilicity, surface charge, as well as water permeability and rejection of EDC were investigated. The results revealed that the inclusion of TNS in the membrane resulted in the increase of water permeability and EDC rejection. When treating the mixture of bisphenol A (BPA) and caffeine at 100 ppm feed concentration, the TFN membrane incorporated with 0.05% TNS achieved water permeability of 1.45 L/m2·h·bar, which was 38.6% higher than that of unmodified TFC membrane, while maintaining satisfactory rejection of >97%. The enhancement of water permeability for TFN membrane can be attributed to their hydrophilic surface and unique nanochannel structure created by the nanoscale interlayer spacing via staking of TiO2 nanosheets. Furthermore, the 0.05TFN membrane exhibited excellent fouling resistance towards BPA and caffeine pollutants with almost 100% flux recovery for three cycles of operations.

Item Type:	Article
Additional Information:	Indexed by Scopus
Uncontrolled Keywords:	Bisphenol A; Caffeine; Endocrine disrupting chemicals; Thin film nanocomposite membrane; Titania nanosheet
Subjects:	T Technology > TP Chemical technology
Faculty/Division:	Faculty of Chemical and Process Engineering Technology
Depositing User:	Mrs Norsaini Abdul Samat
Date Deposited:	25 Nov 2024 06:36
Last Modified:	25 Nov 2024 06:36
URI:	http://umpir.ump.edu.my/id/eprint/42977
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